In this study, superparamagnetic iron oxide nanoparticles (MNPs) were synthesized via exposure of fungal cell filtrate from Aspergillus flavus to aqueous ions. The extracellular synthesis MNPs was monitored by UV–Vis spectrophotometry and showed an absorption peak at 310 nm. morphology found be flake-like, as confirmed Field Emission Scanning Electron Microscopy (FESEM), while the average cryst...